Dental mallet or plugger.



Patented Aug. l4, I900.

No; 656,|24. u. a. KINNISON.

DENTAL NIALLET 0R PLUGGER.

(Application filed Dec. 21, 18994) (No Model.)

m: uonmk vzrzas co, Puoroumu wnswumcm. ov a.

rrn

ULYSSES GRANT KINNISON, OF ABERDEEN, WASHINGTON.

DENTAL MALLET OR PLUGGER.

SPECIFICATION forming part of Letters IPatent No. 656,124., dated August 14, 1900.

' Application filed December 21, 1899. Serial No. 741,206. (No model.)

To aZZ whom it may concern:

Be it known that I, ULYssEs GRANT KINNI- soN, a citizen of the United States, residing at Aberdeen, in the county of Ohehalis and State of Washington, have invented a new and useful Right-Angular Dental-Engine Mallet or Plugger, of which the following is a specification.

This invention relates to a dental mallet or plugger, andmore particularly to that class of such devices known as an lelo ers b bo and has for its object to simplify the construction of these instruments and render them more positive and efficient in operation by actuating the pluggerby a particular construction embodying features of adjustment whereby the stroke of the plugger may be varied, all the parts of the device being readily separable for cleaning, oiling, or other manipulation, and when assembled forming a tight inclosure to prevent the entrance of dust or dirt or fluids from the month thereinto with disadvantage, and also to prevent the oil from running out into the mouth of the patient during the use of the device.

With these and other objects and advantages in view the invention. consists in the construction and arrangement'of the several parts, which will be more fully hereinafter described and claimed.

In the drawings, Figure 1 is a side elevation of the improved attachment. Fig. 2 is alongitudinal vertical section, on an enlarged scale, of the improved device, the cam being shown broken away to illustrate the mode of attaching the same to the spindle. Fig. 3 is a transverse vertical section on the line 3 3 of Fig. 2. Fig. 41s a bottom plan view of the inclosing cylinder. Fig. 5 is a detail perspective view of the front extremity of the spindle, showing the washer or holding-disk thereof. Fig. 6 is a sectional elevation of the device shown by Fig. 5. Fig. 7 is a detail perspective view of the holding washer or disk, which is applied to the front or outer extremity of the spindle. Fig. 8 is a detail perspective view of the plugger-head. Fig.

9 is a detail perspective view of the cam for the spindle which is adapted to actuate the plugger-head. I

Similar. numerals of reference are employed and provides a shoulder 7.

to indicate corresponding parts in the several views.

The numeral 1 designates the surrounding casing, which comprises an inner cylindrical extremity 2 from which projects a neck 3,

having a bore 4, communicating with the said cylindrical extremity and a longitudinal opening 5, continuous with the said bore and extending through an outer screw-threaded terminal 6, which is reduced in cross-section A spindle 8 is rotatably mounted in the casing and has an intermediate stop enlargement 9, which bears against the front end wall of the bore 4 and prevents the said spindle from moving longitudinally in an outward direction beyond a predetermined extent, the rear extremity 10 of the spindle being constructed to receive the usual flexible shaft or other operating de vice, and-the outer end 11 is reduced and screw-threaded, and extending transversely therethrough is a slot 12. A holding-washer 13 is applied over the outer extremity of the spindle 8 in rear of the screw-threads and is held in place by a key 14, seated in a slot 15, extending diametrically thereof, and also passed through the slot 12 in the said extremity of the spindle. This washer bears against the-end of the adjacent reduced portion of the neck and obstructs rearward longitudinal movement of the said spindle, it being understood, however, that the said spindle is free to rotate without frictional binding either by the stop enlargement 9 or the said holding-washer. On theouter screwthreaded extremity 11 of the spindle 8 an elliptical cam is secured by engagement with the screw-threads of said extremity and is readily removable at any time when it is desired to separate the parts of the device,though it will be held in proper working position at all times and without loosening in view of the fact that the direction of rotation thereof will be opposed or reverse to the movement necessary to attach the same. p

The outer extremity of the neck, as well as the cam 16, is covered by an inclosing cylinder 17, which has a rear entrant screw-threaded socket 18 to removably engage the said outer extremity of the neck, the said socket being preferably continuous with a rear closed end 19, and when the said cylinder is fully applied the adjacent portion of the end 19 bears against the shoulder 7, and a tight joint is thus produced. The outer end of the cylinder 17 is open and has interior screw-threads 20 to removably receive a tubular cap 21, which completely closes the said outer end of the cylinder, but can be readily detached for exposure of mechanism within the cylinder, and for convenience in attaching or detaching the said cap it is provided with a milled rim 22. The lower portion of the cylinder 1'7, nearer the outer end of the same, is formed with an opening 23, which is preferably of rectangular shape and substantially concentric with an attaching-collar 24, depending from the cylinder and having exterior screwthreads 25 to adj ustably receive a regulatingcap 26, provided with corresponding interior screw-threads and of tubular form, with a lower closed end having a central circular opening 27. \Vithin the collar 24 and held in place by the regulating-cap 26 is a pluggerhead 28, having an upper contacting lug or projection 29, with flat sides 30, and at the base of said lug or projection is a stop-flange 31. The lug or projection 29 is freely movable through the opening 23 in the cylinder 17, the flat sides preventing the plugger-head from turning, and thereby always dispose an upper rounded surface 32 thereof in positive working relation to the cam 16, which bears thereon and alternately imparts thereto a downward movement and in accordance with the engagement therewith of the portions of the said cam located at the extremities of the longest axis. The lower portion 33 of the plugger-head is tubular and interiorly screwthreaded and has free movement through the opening 27 in the closed end of the cap 26, said tubular portion of the plugger-head removabl y receiving the screw-threaded shank Set of a plugger 35 or other instrument which may be adapted for use in connection with the improved device. Surrounding the plugger-head 28, below the flange 31, is a coiled spring 36, which is confined between said flange and the lower closed end of the cap 26, and the tension of said spring on the pluggerhead, as well as the stroke of said device and the plugger or other instrument carried by said head, is adapted to be regulated by adjusting the said cap 26 on the collar 2+1, and thereby control the movement of the plugger and produce either a heavy or light action or a striking pressure of intermediate degree of force and in accordance with the requirements of the work being performed.

After the parts have been fully assembled the device will present the appearance shown by Fig. 1, and it will be observed that a thorough inclosure of all the mechanism results, as well as obstruction to the entrance of dirt, grit, or moisture thereto, or an exudation therefrom of the lubricating-oil, and thus provide for efiectiveness in the operation of gold filling, wherein moisture of any description must be absolutely excluded from touching or being deposited on the gold for reasons which will be readily understood. It will also be seen that the cylindrical extremity 2 of the casing provides convenient means for attaching. the power devices, and said neck and cylinder also afford the operator means for obtaining a firm grip on the improved device. Exterior hurtful projections are also avoided in order that the mouth of the patient may not be injured in the least during the use of the attachment, and it is intended that the exterior surface, at least, of the entire device be suitably plated to present a neat and cleanly appearance and also to render the device more durable.

In operation the rotation of the spindle 8 similarly actuates the cam 16, and the latter being of elliptical form the bearing portions thereof at the extremities of the longest axis will be successively brought into contact with the lug or projection 29 of the plugger-head 28 and force the latter downwardly, together with the plugger or other instrument carried thereby, against the tension of the spring 36, which will act as soon as the lug or projection 29 is cleared to immediately elevate the plugger-head and dispose it in normal position at each interval of time between the contact with the lug or projection 29 of the opposite portions of the cam at the extremities of the longest axis. There will be no jar or jerk in the operation of the plugger-head and the instrument carried thereby owing to the rounded or curved surface of the cam regularly bearing upon the lug or projection 29, and,as before indicated,the rectangular shape of the opening 23 and the flat sides 30 of the lug or projections 29 will insure a regularity in position of the plugger-head and instrument therein, and thereby also permit the attachment to be held at a certain angle and have the pluggerdelivera blow with positive effect at the angle that may be desired and necessary.

Numerous advantages will become apparent to those using the improved device aside from those set forth, and it is obvious that changes in the form, proportions, and minor details may be resorted to without in the least departing from the principle or sacrificing any of the advantages of the invention.

Having thus described the inventiou,what is claimed as new is- 1. In a dental attachment of the character set forth, the combination of a spindle having an elliptical cam thereon with a fixed plane of rotation, a horizontally-disposed casing surrounding the said cam, a plugger-head disposed in a plane at a right angle to the spindle and having a portion thereof normally in the plane of rotation of the said cam, an adjustable cap extending downwardly from the casing in a plane at a right angle to the latter and surrounding an upper portion of the plugger-head to vary the force of the blow of the latter, said cap having its lower end provided with a central opening and forming a lower projecting portion of the attachment, and a spring surrounding a portion of the said plugger-head and forcing the latter upwardly to the cam, said spring being inclosed bythe cap and hearing at opposite extremities on part of said head and cap.

2. In a dental attachment of the character set forth, the combination of a spindle having an elliptical cam thereon, with a fixed plane of rotation, a casing surrounding the cam and having an angular opening in the lower portion thereof, and a spring-actuated adjustable plugger-head disposed in a plane at a right angle to the spindle and having a portion thereof normally in the plane of rotation of the said cam, the part of the head adjacent to the cam being of angular form and movable through the correspondingly shaped opening in the casing to prevent rotative movement of the said head.

3. In a dental attachment of the characterv set forth, the combination of a spindle having an elliptical cam fixed thereon, an inclosing device for the said cam having an angularlyshaped opening in the lower portion thereof, and a plugger-head having a spring action and including an upper lug or projection having a shape corresponding to said opening in the inclosing device for the cam to prevent rotary movement of the head.

4. In a dental plugger or mallet of the character set forth, the combination of a casing including a neck having an outer reduced screw-threaded extremity, a spindle'mounted in the said casing and having its front terminal projecting beyond the screw-threaded extremity of the neck and also provided with screw-threads and a slot therethrough, aholding-washer mounted on the outer terminal of the spindle and having a diametric slot therein, a key inserted through the slot in the spindle and that of the washer, the said washer bearing against the outer extremity of the neck and the spindle having a stop enlargement at an intermediate point to contact with another portion of the neck to thereby prevent longitudinal movement of the spindle, an elliptical cam removably mounted on the outer terminal of the spindle, a plugger-head disposed in a plane at a right angle to the spindle and having an actuating-spring to normally project a portion thereof in the plane of rotation of said cam, and means for inclosing the cam and the greater portion of the plugger-head.

5. In a dental attachment of the character dle inclosed thereby and adapted to have opcrating mechanism connected thereto, an elliptical cam removably mounted in fixed position on the outer end of the spindle, an inclosing cylinder removably applied to the outer extremity of the casing and in which the cam is located, the said cylinder having a lower angularly-shaped opening surrounded by a screw-threaded collar, a cap removably mounted in the end of the cylinder, a regulating-cap adjustably engaging the said collar, and a spring-actuated plugger-head adjustably controlled by'the said regulatingcap and having an upper lug or projection shaped to correspond to the opening in the cylinder to prevent rotary movement of the head, the said lug or projection being adapted for contact with opposite portions of the cam.

.6. In a dental attachment of the character set forth, the combination of a spindle having an elliptical cam thereon with a fixed plane of rotation,a casing surrounding the cam and having an angular opening in the lower portion thereof, a spring -.actuated adjustable plugger-head disposed in a plane at a right angle to the spindle and having an upper lug or projection in the plane of rotation of the cam, the said lug or projection being of angular form and movable through the correspondingly-shaped opening in the casing to prevent turning of the head, and a bottom adjustable cap through which the head movably projects.

7. In a dental attachment of the character set forth, the combination of a spindle having a cam fixed thereon and rotatable therewith, a cylindrical casing inclosing the cam and in the same plane as the spindle, the said casing having an end cap and a collar in aplane at right angles thereto, a bottom cap adjustably mounted on the said collar, and a spring-actuated plugger-head partially inclosed by the collar and cap adjustable on the latter and disposed in a plane at a right angle to the I spindle, said plugger-head having the upper portion thereof normally in the plane of rotation of the cam, the adjustable cap on the collar forming the lowest projecting portion of the casing and thereby closely arranging and inclosing the parts of the device of the attachment for insertion in the mouth of a patient.

In testimony that I claim the foregoing as my own I have hereto affixed my signature in the presence of two witnesses.

ULYSSES GRANT KINNISON.

Witnesses:

M. ROB SrArP, S. W. PEARSON. 

